<https://roboticx.ps/product/8-channel-5v-relay-module/#product>
<http://schema.org/description>
" A Relay is a digital switch to control much higher voltages and currents than your normal Arduino boards does. When inputs a logic voltage, the relay will switch to allow current to flow or cutoff, depending on your wiring. A Relay usually consists of a coil, 1 common terminal, 1 normally closed terminal and one normally open terminal. When the coil is energized, the common terminal and the normally open terminal will have continuity.\r\n\r\nWhy do we want to use a relay and do we really need to? Anytime you want to switch on/off a device which draws more current or works with a high voltage, you'll need to use a relay, such as controlling of headlights, parking lights, horns, etc. There are also the 2-Channel Relay Module and 4-Channel Relay Module for your option. Please Note that Connect the VCC to JD-VCC with the jumper when using.\r\n\r\n\r\n\r\nSpecification\r\n\r\n\r\n\r\n \tControl Voltage: 5V DC\r\n \tMax Control Capacity:10A@250VAC or 10A@30VDC\r\n\r\n\r\n\r\nDownload\r\n\r\n\r\n\r\n \t8-Channel Relay Schematic\r\n\r\nشرح باللغة العربية \r\n&amp;nbsp;\r\n\r\n\r\nhttps://www.youtube.com/watch?v=IDLQmcnIS2Q"
<https://roboticx.ps/product/8-channel-5v-relay-module/>